Yes it works great for me too. I get mine only once a year or so but they are severe and last for about a week. For me the trick is to get going before the cluster gets severe. However, I have done it during a severe attack but it's hard (no pun intended). Even in severe pain once the "pleasure state" starts to kick in the pain miraculously disappears completely. I try not to finish the job in case I need to do it again but usually the first time does it for at least 24 hours anyway.
Its free, safe, and natural. Most important it works for us and hopefully others too.